600 



FAMILY XX. — NABID^E. 



574 (827). Nabis flavomarginatus Scholtz, 1846, 114. 

 Elongate-oval, much broader behind the middle. Dull straw-yellow, 



rather thickly clothed with short fine whitish appressed hairs; head with 

 a median blackish stripe, this wider between the eyes ; front lobe of 

 pronotum with sides and a narrow median line fuscous ; under surface 

 brownish-yellow with a dusky stripe along the sides ; antennae and legs 

 pale brownish-yellow, immaculate or with a few small brown dots; front 

 and middle femora with some vague brownish cross-bars on inner side. 

 Head one-third shorter than pronotum, its front declivent. Joint 1 of 

 antenna? about two-thirds the length of head, 2 one-half longer than 1, 

 3 one-fourth shorter than 2, twice as long as 4. Beak slightly surpass- 

 ing middle coxa?. Disk of pronotum, except collar, with a narrow median 

 impressed line; sides febly sinuate, base about two-thirds wider than 

 apex. Elytra (brachypterous form) reaching third dorsal, their tips 

 narrowly rounded or obtusely angled, the membrane very short. Other 

 characters as in key. Length, 8 — 10 mm. 



Golden, Colo., July 25 (Gerhard). The form described is var. 

 vanduzeei Kirk., known only from Colorado and Washington. 

 The typical long-winged flavomarginatus is palsearctic and oc- 

 curs in Canada, Greenland and Maine. 



575 (829). Nabis ferus (Linnaeus), 1758, 449. 



Elongate, macropterous form; oblong and more robust, brachypter- 

 ous one. Dull grayish-yellow, opaque; head and front lobe of pronotum 

 with a median dark stripe, the latter also with 

 irregular dark lines, the collar sometimes blackish; 

 hind lobe of pronotum usually with five vague dusky 

 stripes; elytra with numerous small fuscous dots 

 between the nervures ; membrane pale gray, the vein:; 

 dusky; sides of under surface as far back as third 

 ventral with a fuscous stripe; middle of mesosternum 

 fuscous; antennae reddish-brown, the terminal joints 

 darker; legs dull yellow, the femora with but few 

 small scattered brownish spots or none, their inner 

 surface with transverse brownish bars. Joint 1 of 

 antennae shorter than head, 2 and 3 longer, subequal, 

 4 one-half the length of 3. Elytra surpassing abdo- 

 men by one-third the length of membrane, macrop- 

 terous form; reaching its tip, the membrane very 

 small or wanting, brachypterous one. Front femora 

 / ji moderately swollen. Length, 6.5 — 8.5 mm. (Fig. 149). 



Pig. L49. Male, X 6. 



(After osbom). Frequent throughout Indiana, more so in 



the northern portion. Hibernates as imago beneath dead leaves 

 and other cover along roadsides and cultivated fields ; in sum- 

 mer found on foliage of grasses and weeds in meadows and 

 waste places. It is a palsearctic species which occurs through- 

 out Canada and the northern United States. Recorded also 



